1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * lnbp21.c - driver for lnb supply and control ic lnbp21 |
4 | * |
5 | * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de> |
6 | * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> |
7 | * |
8 | * the project's page is at https://linuxtv.org |
9 | */ |
10 | #include <linux/delay.h> |
11 | #include <linux/errno.h> |
12 | #include <linux/init.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/string.h> |
16 | #include <linux/slab.h> |
17 | |
18 | #include <media/dvb_frontend.h> |
19 | #include "lnbp21.h" |
20 | #include "lnbh24.h" |
21 | |
22 | struct lnbp21 { |
23 | u8 config; |
24 | u8 override_or; |
25 | u8 override_and; |
26 | struct i2c_adapter *i2c; |
27 | u8 i2c_addr; |
28 | }; |
29 | |
30 | static int lnbp21_set_voltage(struct dvb_frontend *fe, |
31 | enum fe_sec_voltage voltage) |
32 | { |
33 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; |
34 | struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, |
35 | .buf = &lnbp21->config, |
36 | .len = sizeof(lnbp21->config) }; |
37 | |
38 | lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN); |
39 | |
40 | switch(voltage) { |
41 | case SEC_VOLTAGE_OFF: |
42 | break; |
43 | case SEC_VOLTAGE_13: |
44 | lnbp21->config |= LNBP21_EN; |
45 | break; |
46 | case SEC_VOLTAGE_18: |
47 | lnbp21->config |= (LNBP21_EN | LNBP21_VSEL); |
48 | break; |
49 | default: |
50 | return -EINVAL; |
51 | } |
52 | |
53 | lnbp21->config |= lnbp21->override_or; |
54 | lnbp21->config &= lnbp21->override_and; |
55 | |
56 | return (i2c_transfer(adap: lnbp21->i2c, msgs: &msg, num: 1) == 1) ? 0 : -EIO; |
57 | } |
58 | |
59 | static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) |
60 | { |
61 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; |
62 | struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, |
63 | .buf = &lnbp21->config, |
64 | .len = sizeof(lnbp21->config) }; |
65 | |
66 | if (arg) |
67 | lnbp21->config |= LNBP21_LLC; |
68 | else |
69 | lnbp21->config &= ~LNBP21_LLC; |
70 | |
71 | lnbp21->config |= lnbp21->override_or; |
72 | lnbp21->config &= lnbp21->override_and; |
73 | |
74 | return (i2c_transfer(adap: lnbp21->i2c, msgs: &msg, num: 1) == 1) ? 0 : -EIO; |
75 | } |
76 | |
77 | static int lnbp21_set_tone(struct dvb_frontend *fe, |
78 | enum fe_sec_tone_mode tone) |
79 | { |
80 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; |
81 | struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, |
82 | .buf = &lnbp21->config, |
83 | .len = sizeof(lnbp21->config) }; |
84 | |
85 | switch (tone) { |
86 | case SEC_TONE_OFF: |
87 | lnbp21->config &= ~LNBP21_TEN; |
88 | break; |
89 | case SEC_TONE_ON: |
90 | lnbp21->config |= LNBP21_TEN; |
91 | break; |
92 | default: |
93 | return -EINVAL; |
94 | } |
95 | |
96 | lnbp21->config |= lnbp21->override_or; |
97 | lnbp21->config &= lnbp21->override_and; |
98 | |
99 | return (i2c_transfer(adap: lnbp21->i2c, msgs: &msg, num: 1) == 1) ? 0 : -EIO; |
100 | } |
101 | |
102 | static void lnbp21_release(struct dvb_frontend *fe) |
103 | { |
104 | /* LNBP power off */ |
105 | lnbp21_set_voltage(fe, voltage: SEC_VOLTAGE_OFF); |
106 | |
107 | /* free data */ |
108 | kfree(objp: fe->sec_priv); |
109 | fe->sec_priv = NULL; |
110 | } |
111 | |
112 | static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe, |
113 | struct i2c_adapter *i2c, u8 override_set, |
114 | u8 override_clear, u8 i2c_addr, u8 config) |
115 | { |
116 | struct lnbp21 *lnbp21 = kmalloc(size: sizeof(struct lnbp21), GFP_KERNEL); |
117 | if (!lnbp21) |
118 | return NULL; |
119 | |
120 | /* default configuration */ |
121 | lnbp21->config = config; |
122 | lnbp21->i2c = i2c; |
123 | lnbp21->i2c_addr = i2c_addr; |
124 | fe->sec_priv = lnbp21; |
125 | |
126 | /* bits which should be forced to '1' */ |
127 | lnbp21->override_or = override_set; |
128 | |
129 | /* bits which should be forced to '0' */ |
130 | lnbp21->override_and = ~override_clear; |
131 | |
132 | /* detect if it is present or not */ |
133 | if (lnbp21_set_voltage(fe, voltage: SEC_VOLTAGE_OFF)) { |
134 | kfree(objp: lnbp21); |
135 | return NULL; |
136 | } |
137 | |
138 | /* install release callback */ |
139 | fe->ops.release_sec = lnbp21_release; |
140 | |
141 | /* override frontend ops */ |
142 | fe->ops.set_voltage = lnbp21_set_voltage; |
143 | fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; |
144 | if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/ |
145 | fe->ops.set_tone = lnbp21_set_tone; |
146 | printk(KERN_INFO "LNBx2x attached on addr=%x\n" , lnbp21->i2c_addr); |
147 | |
148 | return fe; |
149 | } |
150 | |
151 | struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe, |
152 | struct i2c_adapter *i2c, u8 override_set, |
153 | u8 override_clear, u8 i2c_addr) |
154 | { |
155 | return lnbx2x_attach(fe, i2c, override_set, override_clear, |
156 | i2c_addr, LNBH24_TTX); |
157 | } |
158 | EXPORT_SYMBOL_GPL(lnbh24_attach); |
159 | |
160 | struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, |
161 | struct i2c_adapter *i2c, u8 override_set, |
162 | u8 override_clear) |
163 | { |
164 | return lnbx2x_attach(fe, i2c, override_set, override_clear, |
165 | i2c_addr: 0x08, LNBP21_ISEL); |
166 | } |
167 | EXPORT_SYMBOL_GPL(lnbp21_attach); |
168 | |
169 | MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24" ); |
170 | MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin" ); |
171 | MODULE_LICENSE("GPL" ); |
172 | |